After removing password from my user account I cant log in

You could try this:
How do I recover my Linux Mint password?

Reset forgotten/lost main user password in Linux Mint

Reboot your computer / Turn your computer on.
Hold down the Shift key at the start of the boot process to enable the GNU GRUB boot menu (if it does not show)
Press ESC at the GNU GRUB prompt.
Press e for edit.
Use the Arrow keys to highlight the line that begins with kernel and press the e key.
Source: https://ostoday.org/linux/how-do-i-enable-automatic-login-in-linux-mint.html

You could also try the default sign in for mint which is name: mint and no password after you select ctrl+alt+f1.

 

a shot in the dark here but when the log in screen comes up and asks for a password, just hit the Enter key.

 

I found this not sure if it will work for you but reading it I don't think it will mess anything up. Try at your own risk but it seemed to work for this person:
My brute force work around was to add a little script that gets run at boot up after a small delay to start gdm. If it's already started, the script doesn't affect anything, but otherwise, at least GDM gets loaded:

1. Edit your system crontab:

Code:
sudo nano /etc/crontab
add this line to the end:

Code:
@ReBoot root /root/gdmstart
2. Make the gdmstart script:

Code:
sudo nano /root/gdmstart
with this contents:

Code:
#!/bin/bash
sleep 6
/usr/sbin/service gdm start
3. Make the script executable:

Code:
sudo chmod u+x /root/gdmstart
If that doesn't work, you might need to increase the "sleep 6" to a longer sleep on your computer. On the other hand, if there is a long pause before the graphical login starts, you may need to decrease the sleep number so gdm gets started sooner.

 

This may be a better way to go:
Reset forgotten/lost main user password in Linux Mint
You can reset your password following the next steps:

1. Reboot your computer / Turn your computer on.
2. Hold down the Shift key at the start of the boot process to enable the GNU GRUB boot menu (if it does not show)
3. Press ESC at the GNU GRUB prompt.
4. Press e for edit.
5. Use the Arrow keys to highlight the line that begins with kernel and press the e key.
6. Go to the very end of the line and add rw init=/bin/bash
7. Press Enter and then press b to boot your system.
8. Your system will boot up to a passwordless root shell.
9. Type in passwd yourusername
10. Set your new password.
11. Restart your system.

 

You are correct sometimes Linux can throw a curve ball at you. I am still learning Linux and I' ve been using it a few years now. Well if that works for now using Startx command at least you can get in. If you need more help feel free to post back, I am by no means proficient on Linux but I can always try and help.